package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对前端传递的密码进行md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes()); //密码加密
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    //新增员工

    @Override
    public void save(EmployeeDTO employeeDTO){
        Employee employee = new Employee();
        //将DTO对象的属性拷贝到实体对象
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置账户初始状态
        employee.setStatus(StatusConstant.ENABLE);
        //设置账户初始密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //调用Mapper接口中的方法将数据保存
        employeeMapper.insert(employee);
    }

    //员工分页查询
    @Override
    public PageResult pageList(EmployeePageQueryDTO employeePageQueryDTO){
        //启用PageHelper分页插件
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> pageRes = (Page<Employee>) employeeMapper.selectByName(employeePageQueryDTO.getName());
        return new PageResult(pageRes.getTotal(),pageRes.getResult());
    }

    //修改员工状态
    @Override
    public void changeStatus(Integer status, Long id) {
        //本质上是修改员工的账户信息，为了后面sql语句好编写，并少写Mapper接口的方法，先创建一个实体对象
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();
        employeeMapper.update(employee);
    }

    //根据id查询员工信息
    @Override
    public Employee selectById(Long id){
        return employeeMapper.selectById(id);
    }

    //编辑员工信息
    @Override
    public void update(EmployeeDTO employeeDTO){
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        employeeMapper.update(employee);
    }

}
